fix: 修改多个处理函数的返回类型为指针类型，以提高内存使用效率并避免不必要的拷贝

ws_client/client.go

@@ -90,7 +90,7 @@ func (c *WebSocketClient) receiveMessages() {
 		}
 		go func() {
 			reply := handler.MsgInHandler(msg)
-			if reply.ReplyMsg != "" {
+			if reply != nil {
 				action.ActionManager.SendMsg(reply)
 			}
 		}()